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He was preceded by Michael Argyle and proceded by Leland T. Lynch. His brief tenure was marred by an antagonistic relationship with conn officer Geordi La Forge, who would ironically become chief engineer of the vessel himself in 2365 when the two disagreed over who should be in command of the Enterprise during a combat situation. When La Forge decided to separate the saucer, Logan was placed in command of the saucer section. (TNGepisode: "The Arsenal of Freedom")

Logan went on to be chief engineer of the USS Bradbury. In 2371, he was murdered by Tana Santu, a mentally disturbed woman from Zorta who was systematically eliminating all former Enterprise-D chief engineers. (TNGcomic: "Suspect")